Poly(2-vinylpyridine)

Catalog NumberHG-BULK25014157

CAS Number25014-15-7

CategoryPolymers

Molecular Weight

Mw ~60kDa

Appearance

Yellow solid

Application

Industrial Coatings: Crosslinked or composite films form dense protective layers with hydrophobicity (contact angle >90°) and chemical stability, providing long-term salt-spray corrosion protection for metals and chemical equipment.; Medical Materials: pH-responsive micelles enable tumor-targeted anticancer drug release in acidic microenvironments.; Antibacterial Coatings: Quaternary ammonium-modified surfaces achieve >99% inhibition against multiple bacterial strains.; Electronic Packaging: High transparency and moderate dielectric properties make it suitable for flexible display insulation layers or optical films, balancing protection and signal transmission.

Storage

Keep in a cool, dark, and dry place

Specification

96% min

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Case Study

Poly(2-vinylpyridine) as a Model Polymer for Probing Molecular Weight Dependence of Interfacial Interactions in Silica Nanocomposites

Voylov, Dmitry N., et al. ACS Macro Letters 6.2 (2017): 68-72.

Poly(2-vinylpyridine) (P2VP) enables systematic investigation of polymer-nanoparticle interfacial interactions. Using X-ray photoelectron spectroscopy (XPS) and sum frequency generation (SFG), the molecular weight (MW) dependence of hydrogen bonding with silica nanoparticles (NPs) was revealed, providing microscopic insight into the structure of the adsorbed layer.
Experimental Protocol: Silica NPs (25 nm) were mixed with P2VP of MW = 1, 9, 59, 100, 400 kg/mol at 40 wt% or 50 wt% NP loading. XPS analyzed N 1s core levels to identify hydrogen bonds between pyridine nitrogen and silanol groups. SFG measured free -OH vibrations on the NP surface.
Performance Evaluation: In neat P2VP, the N 1s peak at 399.3 eV corresponded to pyridine nitrogen. In composites, an additional peak at ≈400.3 eV appeared, attributed to hydrogen bonding. Its relative intensity decreased with increasing MW (e.g., stronger for 1 kg/mol than for 100 kg/mol), indicating fewer hydrogen bonds for longer chains. Concomitantly, the intensity of the π-shakeup peak (≈406 eV) diminished, suggesting additional non-covalent interactions (e.g., OH-π). SFG showed that free -OH groups on silica increased with MW, consistent with reduced hydrogen bonding. Matrix density relative to neat polymer was higher for low MW but decreased at high MW, reflecting looser chain packing.
Conclusion: Poly(2-vinylpyridine) reveals that lower molecular weight promotes denser hydrogen bonding and interfacial packing, while higher MW leads to frustrated chain conformations and fewer interactions. This understanding guides design of polymer nanocomposites with tailored interfacial properties.

Poly(2-vinylpyridine) Particles as pH-Responsive Stabilizers for Liquid Marbles

Fujii, Syuji, et al. Soft Matter 6.3 (2010): 635-640.

Poly(2-vinylpyridine) (P2VP) latex particles, sterically stabilized with a polydimethylsiloxane (PDMS) macromonomer, enable the formation of millimetre-sized liquid marbles (water droplets coated with hydrophobic particles). The weakly basic P2VP core confers pH-tunable wettability, allowing rapid, on-demand disintegration under acidic conditions.
Fabrication and Characterization: Lightly cross-linked PDMS-P2VP latexes (Dn ≈ 607 nm) were synthesized by non-aqueous dispersion copolymerization of 2-vinylpyridine and divinylbenzene in n-hexane/2-propanol using a PDMS macromonomer as steric stabilizer. XPS confirmed PDMS at the particle surface; ¹H NMR gave 1.0 wt% PDMS content. Static contact angles of water on pressed pellets and the stability of liquid marbles on water surfaces were evaluated as a function of pH.
Performance Evaluation: At pH ≥ 6.0, the contact angle was 113° (hydrophobic), enabling stable liquid marble formation. Below pH 3.0, the contact angle dropped to 87° (hydrophilic). Liquid marbles placed on water at pH 4.9 or above remained intact for minutes. At pH < 3.8, the marbles disintegrated within seconds because protonated P2VP chains rendered the particles hydrophilic, causing spontaneous desorption from the air-water interface. The critical pH for stability correlates with the pKa of P2VP (≈4.7). Mechanical integrity tests using a droplet roller showed that at pH 6.5 liquid marbles survived impacts from up to 13 cm height, while at pH 2.0 they broke already at 2 cm. Addition of acid to a stable liquid marble caused disintegration within 45 s.
Conclusion: Poly(2-vinylpyridine) latex particles provide a simple, pH-responsive platform for liquid marbles, with potential applications in controlled release capsules and smart materials.

• Molecular Weight: Mw ~60kDa
• Appearance: Yellow solid
• Application: Industrial Coatings: Crosslinked or composite films form dense protective layers with hydrophobicity (contact angle >90°) and chemical stability, providing long-term salt-spray corrosion protection for metals and chemical equipment.; Medical Materials: pH-responsive micelles enable tumor-targeted anticancer drug release in acidic microenvironments.; Antibacterial Coatings: Quaternary ammonium-modified surfaces achieve >99% inhibition against multiple bacterial strains.; Electronic Packaging: High transparency and moderate dielectric properties make it suitable for flexible display insulation layers or optical films, balancing protection and signal transmission.
• Storage: Keep in a cool, dark, and dry place
• Specification: 96% min